Iodine-Induced Regioselective C−C and C−N Bonds Formation of N-Protected Indoles
摘要:
A mild, metal-free, and environmently benign iodine-promoted regioselective C-C and C-N bonds formation of N-protected indole derivatives giving 2,3'-biindoles 2 and 4-(1H-indol-2-yl)morpholines 4 is successfully demonstrated. Various bioactive 2,3'-biindoles and 4-(1H-indol-2-yl)morpholines, bearing electron-rich to moderately electron-poor substituents, can be prepared in moderate to good yields.
Acid-catalyzed acylation reaction via C–C bond cleavage: a facile and mechanistically defined approach to synthesize 3-acylindoles
作者:Qi Xing、Pan Li、Hui Lv、Rui Lang、Chungu Xia、Fuwei Li
DOI:10.1039/c4cc05047a
日期:——
A facile acid-catalyzed acylation of indoles with 1,3-dione as an eco-friendly acylating agent was developed. This protocol combines C-C bond cleavage and heterocyclic C-H bond functionalization to form new C-C bonds. Based on the detailed mechanistic studies, a credible mechanistic pathway was proposed.
Silver-catalyzed synthesis of 4-substituted benzofurans<i>via</i> a cascade oxidative coupling-annulation protocol
作者:Yang Ye、Renhua Fan
DOI:10.1039/c1cc10137d
日期:——
A facile synthesis of 4-indole benzofurans via an oxidative dearomatization, a silver-catalyzed cascade Michael addition-annulation, and an aromatization is reported.
Palladium-catalyzed mono- and double-carbonylation of indoles with amines controllably leading to amides and α-ketoamides
作者:Qi Xing、Lijun Shi、Rui Lang、Chungu Xia、Fuwei Li
DOI:10.1039/c2cc36341k
日期:——
A novel and efficient double-carbonylation of indoles with primary or secondary amines to yield indole-3-α-ketoamides has been developed and bioactive molecules could be one-pot synthesized using the current methodology, which could also be selectively switched to mono-carbonylation to afford indole-3-amides only by a slight modification of reaction conditions.